|GPU:||Imagination PowerVR GT7600 (hexa-core graphics)|
Portal Knights on the Apple iPhone 6S runs at a very respectable median FPS of 29. This is a solid option to try if you have a iPhone 6S.
Portal Knights's battery life on the Apple iPhone 6S is brutal! With less than 3 hours of gaming from a full charge, stay away from this one unless you've got a charge cable handy!